Scale-beam.



LE ROY M. SMITH.

SCALE BBNM. APPLICATION FILED Amm, 191s.

Eatened Ma?. 9, 1915.

Y Y 'lv l lis I 'S102A ibi@ QZ. 7 l M57. per. 37u.

T T I |2754 im @wel ,flilxrrlllffmlrm flllllxlrmlm iii) 10a GHAMT LE ROY MI. SMITH, OF CHICAGO, ILLINOIS.

oEETcE.

SCALE-BEAM.

Specification of Letters Patent. v

l Patented Mar. 9, 1915.

Application filed August 27, 1913. Serial No. 786,863.

T all whom it may concern.'

Be it known that I, LE ROY M. citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Scale-Beamsg and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates `to scales and more particularlyl to the scale beams and sliding Weights aspused4 on balances equipped with scoops for weighing seeds or other small ob- In certain lclasses, of work, such as the testing of seeds, it has heretofore been necessary to use at leastv two, and sometimes three, separate scales `or balances for determining the three important factors in which the weight enters in such testing. l That is,

a scale equipped with a small measuring cup or receptacle has becaused for weighing out the` fifty or hundred grams of seeds reage of moisture in the seeds; a second scale has been used whenever it was necessary toi i the scale or scale beam, which adjustments might be overlooked by the user of the scale 1 or-balance. l

'- -Another obj ectv is to provide means for 1n- Hterlocking the sliding weight with the scale beam at the test weights corresponding to the quantities of seeds required formoisture ,y test: determina-tions, thereby avoiding possible' inaccuracies due to a lack of careful setting of the sliding Weight, or variations due v to the personal error inthe setting as performed by different operators.

A further object is to .prgvidei a sliding' t esca es upon.,l

weight permitting twoo the scale beam tov be read wlthaccuracy Awithout obscuring theimmediately adjacent:

5 graduationsupon the saidbeam and without involving diiiiculties of .manufacture SMITH,-

' disclosing weight,

use on balances of the type shown in the 'weight mounted thereon.

. quired in the determination of the percent-v vthreaded a nut 12,

denting and marring the adjacent edge of`V :'65

the scale beam. l

While the multi-graduated beam, the scaleand the screw tip protector of my invention may all be used with scales or balances of widely varying constructions, they are particularly adapted for Figure lis an elevation of a scale or bal-` ance equipped with my invention. F ig. 2 is an enlarged fragmentary View of the Fig. 3 is a fragmentary sectional view showing the method of making the scale-disclosing openings in the slidingweight. y

In the drawings, Fig. l shows a scale or and of the slidingy balance consisting essentially of a beam 1vv supported upon a standard 2 by a knifeedge orA by a suitable torsion support, and

carrying at one end a forked member 3 holding a removable brass scoop '4. The lower end of the forked member 3 preferably has stops. 5 adapted to impinge .against a prong. '6 `carried by the base 7, of the standard '2. Secured tothe end of the scale beam 1 opposite to that supporting the said forked meme. ber and scoop is a detachable scale beam 8 having a plurality of graduations thereon and a plurality of notches 9 in its upper edge. The beam l also preferably has an arm 10 carrying a screw 1l upon which is moved toward, or away from, the standard Q to adjust the balancing ofthe scale, lhe

balancing point being preferably indicated by a pointer 13 mounted upon the beam i.

and moving over graduations upon an arcuate scale 14 carried by the standard 2. Slidvably mounted upon the auxiliary or graduated portion 8 of the scale beam is a movable weight 15, which is preferably cylindrical in. horizontal section and which has a rectangular perforation substantially equal in width to the thickness ofthe scale beam 8 and somewhat greater in .height than the Width of the said beam portion 8. Mounted which latter may bev within the said rectangular perforation upouj p the lwer surface thereof lis a spring 16,'"f

which normally is flexed out of contact with the lower edge of the beam 8 by its own re' siliency, but which may be pressed into con-y tact with the said lower edge by turning a screw 17 carried by the sliding weight 15.

Etched, stamped or otherwise marked upon the beam 8 and preferably approxif mately midway between its upper and lower edges thereof are graduations 18 corresponding to the avoirdupoisweight of the contents yof the scoop 4, that is, the weight in *ounces ande-'fractions of ounces of the contentsvofthe scoop. This graduation enables the scaleto be used after the ordinary fashion'of balances by sliding the weight 15 until the pointer 14.- indicates an even balance, and

then reading the graduations of the scale 18 i "ftioned opening in the weight 15 has at its' left-hand end a. downwardly extending' corresponding to the left-handedge of the said weight 15.

The portion of the Weight 15 forming the :upper surface of the said rectangularly secwedgeshaped portion 19, which portion is adapted to enter any one of the notches 9 1n the upper edge of the beam 8 so as to inter- Slock the weight,15 therewith. The notches gare preferably so positioned as to interf lock' with the weight 15 when the latter 1s 1n aL position whichjwill adord an even balanc-v ing `of thev scalev whenthe scoop contains a standard quantity of seed, such as fifty or one hundred grams. Consequently, if lthe weight 15 isinterlocked with the notch 9 at the 50 *gram mark,'the desired fifty grains of seeds may be quickly' and *accurately obtained by simply pouring seed into the scoop until the pointer 14' indicates an` exact bal?v ance. In doing so, the interlocking of the notch 9 with the'wedge-'shaped projection 19 avoids any irregularity in the seating of the sliding weight and makes it unnecessary for the observer to' use great care in the shifting :of the said weight, as the same' may easily be manipulated to securethe settingl accuratelyeven in poor light. v Y

,Upon the faceof the beam 8, and preferably adjacent tothel lower edge thereof, lfalso provide a-series of decima-ily arrangedI graduations 20, the latter being computed'y 'l te correspond to the"`weight per bushell of a standard Avolume of seed rpoured .into the scoop 4. Consequently, 'to ascertain the weight per bushel of a given batch of seeds, it is only necessary to measure' the standard quantity of the said seeds into the scoop 1 and to slide the weight 15 along the beam' until the pointer 13 indicates an exact bal-- ance, whereupon the lower scale upon thel beam will indicate the weightper bushelof the said seedswithout requiring the operator to perform any calculations and without introducing" the risk of error involved by such calculations. It will be obvious that in ascertaining this weight per bushel from the lower scale, the graduations immediately above this scale wilt-indicate the weight in ounces of the seeds in the scoop, thereby en- 'ablingv the operator to ascertain both this weight and the proportionate-Weight per, bushel'with'a single setting of the sliding;

weight.

To enable two lower graduations upon the beam to be easily and quickly read with;

accuracy, I preferably provide a pair of perforations 21 in the weight 15 extending` transversely to the face of the beam 8 and.'

body of the weight, while the pointed por- 'tions 22 of the weight adjacent tothe common mouth of the said perforationswill' present a straight outer edge close to the graduations 18-and 20, thereby perinitting.l

the latter -to be read with accuracy.`

Whilel have shown and described 'the i scale of my invention as graduated and used f 1n connection with seed-testing manipula;-

tions, I dornot wishy to be limited to this particular adaptation', nor to the exact arrangement of the' graduations or other defi tails .herein disclosed, it being obvious that the same might' be varied in many ways vention. N either dol wish to be limited t0 graduations reading in ounces,or in pounds per bushel, as other direct-reading .andcomputed'graduations might be substituted for these scales respectively; as for centigrams, or kilograms per liter.

1 l claim as new and desire to cover by-Letexample,

). tersPatentfi,

. '1. In a scale or balance, abeam equippedv upon its face with graduations, in combination with a weight slidably mounted-upon thesai'd beam, there being coacting recess and projection formations disposed respecf tively upon the weightand one longitudinal edge ofthe beam for interlocking the weight and beam'r in predetermined'relative posi-- without departing from the spirit of my in- 'i I tions, and friction means associated with said weight and the opposite longitudinal edge of the beam; said friction means co- 12a "i operating with the 'said formations to hold thev beam and weight interlocked in the said predetermined positions, and said friction means operatmgindependently ofthe said i formations. for interlocking'the beam and termined ones.

weight in positions other than said prede-j vhaving a plurality of relatively angularly disposed openings transverse to the face of the beam and angu 10 erence to the axis of theheam, eech of theA laxly disposed with ref-- said openings causing said weight to present an acute tip alining with one of the said graduations upon the beam.

In testimony whereof I have signed my name in presence of two subscribing wit- 15 vnesses.

e LE RGY M. SMITH.

'Witnessesz ALBERT SCHEIBLE, M. B. LANGE. 

